How to plot different graphs on different intervals of the x-axis?

The problem: need to graph the cubic spline interpolation for estimates of me coefficients (that is me, no `acspline` do not offer). The problem is that on different intervals you need to build a function with different coefficients.
Try to build multiple charts with different time intervals on the axis `x`, but is for the interval specified in the first schedule.
In my head spinning some thoughts about the design of all this in a separate function with the `if`s, but I can't think of how it all right to write. How do you do it?
July 9th 19 at 13:12

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